Breakdown of Я вижу красивую куртку на витрине.
я
I
красивый
beautiful
на
on, at / by (transport) / to (a place) / to (in answer to)
видеть
to see
Questions & Answers about Я вижу красивую куртку на витрине.
Why does the adjective красивую end in -ую while the noun куртку ends in -у?
Nouns and adjectives have different ending patterns. The dictionary form of the noun is куртка, which changes its feminine -а ending to -у in the accusative case. The dictionary form of the adjective is красивая, which changes its feminine -ая ending to -ую.
Why are we using the accusative case for красивую куртку?
Because it is the direct object of the sentence. The jacket is the thing receiving the action of being seen by you (я вижу).
The infinitive is видеть (to see). Why is the 'I' form вижу instead of 'виду'?
The verb видеть has a consonant change in the 'я' (I) form where the д changes to ж. This only happens for the 'I' form; the other forms keep the regular sound (like ты видишь, он видит).
The English translation says 'in the shop window'. Why does the Russian use на (on) instead of в (in)?